Center Parcs - Activities for adults

I'm going to Longleat in October. Have been several times before over the last few years, so know what to expect. However this time I am not having to supervise a child constantly, so I am wondering what activities are worth while for adults.Spa treatment of some kind of course - possibly the Spa Supper evening.

I dont do spas but other Center Parc old-timers tell me the Longleat one is the best

My DH did Tree Trekking with the dc's earlier this year. It was hilarious ... kids are nimble and manage it, no probs. The adults have to rediscover their centre of gravity as their flabby bits drag them the wrong way over the ropes ...

I'm quite happy swimming and cycling tbh, but dh has tried abseiling etc and enjoyed it

Thanks for your suggestions.Good point about the Tree Trekking when you are older... not a nimble a I was as a youngster. Could still be fun though. Alas I don't like sailing, had to do that on school activity courses - hated it.